With BMW seemingly bent on filling every automotive niche it possibly can, we've now been given more details on the M6 Gran Coupe, based on the 6-Series four-door slated for introduction this year.

In essence, the M6 Gran Coupe takes many features from the new F10 chassis M5, including that car's 4.4-liter twin-turbo V8 and seven-speed dual-clutch transmission and wraps them in a slightly harder edge package (slicker profile and lower center of gravity).

With 552 hp and some 501 lb-ft of torque on tap, that should give it a 0-62 mph time of 4.5 seconds and a top speed (electronically limited of course), of 155 mph.

In typical M-car fashion, the Gran Coupe M6 will get more aggressive styling tweaks than the garden variety version, including a more pronounced front fascia, rocker panels and rear diffuser with signature quad exhaust tips.

With the launch of the regular 6-Series Gran Coupe (shown above) still several months away, it's unlikely we'll see the M version materialize for at least a year, though when it does, this car will certainly give Mercedes' 5.5-liter CLS AMG (which makes less power but slightly more torque) a good run for its money.